fix: Wrap the children of ReactPanel with an ErrorBoundary

[mofojed]

• Previously, if a child of the ReactPanel threw, it would cause the panel to close, which could cause the widget to close unexpectedly.
• Instead, have the ReactPanel catch the error and display an error view.
• If any of the children of ReactPanel throw, it won't cause the panel to close. It will just show the error in the panel now.
• Tested against Core with a special branch debug-kill-table
  • Run the following snippet to create a panel with a table in it:

    from deephaven import time_table, ui
    p = ui.panel(time_table("PT1s"))

  • Open the browser console, and enter the command dhKillTable(). The table stops ticking as it's closed.
  • Hover the mouse over the table. This will trigger a NPE and a debugger breakpoint; hit resume a couple times until things resume. An error will be shown on the panel
  • To simulate "reconnecting", then disable the FetchManager and re-enable it: dhDisableFetchManager(), dhEnableFetchManager()
  • Table should be reloaded and ticking again.

[mofojed]

This will need to be picked back to ui-v0.15 as well

[mattrunyon]

How do you reproduce this? Is there an example or would I need to add JS code to throw?

[mofojed]

@mattrunyon I tested against Enterprise with bender_DH-16737 (against dev-grizzly), using steps described in my comments: https://github.com/deephaven-ent/iris/pull/1822#issuecomment-2179377442 Also created a dashboard with a table in it and tested that. I've added steps to this PR description on how to test it with Core. I had a branch with debug commands to help test that.